St Thomas weather in August 2025

Expect 88°F daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in St Thomas in August. Check more long-term weather averages for St Thomas in August before you book your next holiday to Virgin Islands in 2025/2026.

  • 88°F maximum daytime temperature in August in St Thomas88
    88°F max day temperature
  • 9 hours of sunshine per day
  • 14 days with some rainfall in August in St Thomas14
    14 days with some rainfall
  • 75°F minimum night-time temperature in August in St Thomas75
    75°F min night temperature
  • 13 hours of daylight per day in August in St Thomas13
    13 hours of daylight per day
  • High heat & humidity in August in St ThomasH
    High heat & humidity
  • 4.9 inches monthly rainfall in August in St Thomas4.9
    4.9 inches of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in August in St Thomas11
    11+ (Extreme) UV index
  • 82°F sea temperature in August in St Thomas82
    82°F sea temperature

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The August weather guide for Virgin Islands (St Thomas) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C)  |  Imperial (°F)

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How hot is it in St Thomas in August?

Daytime temperatures usually reach 88°F in St Thomas in August with high heat and humidity, falling to 75°F at night.

How sunny is it in St Thomas in August?

There are normally 9 hours of bright sunshine each day in St Thomas in August - that's 67% of daylight hours.

How warm is the sea around St Thomas in August?

The average sea temperature around St Thomas in August is 82°F.

Does it rain in St Thomas in August?

There are usually 14 days with some rain in St Thomas in August and the average monthly rainfall is 4.9 inches.

What is the chance of a hurricane in St Thomas in August?

On average less than 1 day in August in St Thomas is likely to be affected by the passage of one or more tropical storms.

St Thomas August sunrise & sunset times

Browse the sunrise and sunset times for St Thomas in August 2025. Select a month to view St Thomas sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 05:58 18:54
Saturday, 16th August 2025 06:02 18:46
Sunday, 31st August 2025 06:05 18:34

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